Study on Monitoring System for Coastal Environments

本研究以“海岸带环境监测系统之研究”为主题，探讨三个子课题：（1）大面积影像量测、（2）营养盐自动连续量测及（3）量测资料之同化技术。主要研究结果如下：1.海领算法适用于叶绿素浓度较高的海域。但在近岸海域，悬浮物浓度低，对测量影响大，难以推广应用。提出了一种利用多个滤光片测量叶绿素浓度的新方法。粒子图像测速技术（Particle Image Velocimetry，PIV）是一种测量近岸海域流速分布的有效技术。图像数据的坐标应正确转换。传统的互相关方法对于测量流速分布是非常有效的。3.本研究发展的流动注射法对于自动测量是非常实用和有用的。它主要在这里使用。建立了紫外光法测定营养盐的方法。5.将实测资料同化到数学模型中的方法作为基础问题进行了研究，这是今后需要发展的方向。

In this research, "Study on Monitoring System for Coastal Environments", three sub-themes have been settle as (1)Image measurement for extended wide region, (2)Automatic continuous measurement of nutrient and also (3)Assimilation technique for measured data. The obtained results are summarized as following.1.The so-called Ocean Collar Algorithm is useful for the sea where the concentration of chlorophyll is fairly high. However, it is difficult to apply to the coastal sea where its concentration is low and the suspend matter effects to the measurement strongly. The new method for measuring chlorophyll concentration is proposed using several optical filters. It is shown that the spectrum of irradiance gives the concentration correctly.2.Particle Image Velocimetry, PIV, is a useful technique to measure the velocity distribution of coastal sea area. The co-ordinate of Image data should be transformed correctly. The conventional cross-correlation method is very effective for the measurement the velocity distribution.3.The flow injection method, which has been developed in this research, is very practical and useful for the automatic measurement. It is employed here mainly. It is found that the nutrient can be measured as nitrate.4.The method of using ultra violet light has been developed for measuring nutrient. It would be interesting one in the future.5.The assimilation method for measured data to mathematical model has been study as the basic problem, which should be developed in the future.